/sys$common/syshlp/helplib.hlb LSEDIT, Command Qualifiers, /CURRENT_FILE  *Conan The Librarian (sorry for the slow response - running on an old VAX)

  /CURRENT_FILE (D)
  /NOCURRENT_FILE

  If no input file  is  specified  on  the  command  line,  /CURRENT_FILE
  specifies  that  the  name  and type of the current file be used as the
  input file.  If an incomplete file specification is  specified  on  the
  command  line (that is, only a file name or a file type), /CURRENT_FILE
  specifies that the name or the type of the  current  file  be  used  to
  complete  the file specification.  If /NOCURRENT_FILE is specified, LSE
  will not use the current file to resolve an input  file  specification.
  /CURRENT_FILE is the default.